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Migration Pull request 

Everything that was reviewed since last PULL request:
 - fix to control flow (eric)
 - rearrange of hmp commands (juan)
 - Make capabilities more consistent and coherent (juan)
   Not all of them reviewed yet, so only the ones reviewed.
 
 Later, Juan.
 
 PD.  I am waiting to finish review of the compression fixes to send
 them.
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Merge tag 'migration-20230424-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request

Everything that was reviewed since last PULL request:
- fix to control flow (eric)
- rearrange of hmp commands (juan)
- Make capabilities more consistent and coherent (juan)
  Not all of them reviewed yet, so only the ones reviewed.

Later, Juan.

PD.  I am waiting to finish review of the compression fixes to send
them.

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# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 24 Apr 2023 02:08:25 PM BST
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [undefined]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* tag 'migration-20230424-pull-request' of https://gitlab.com/juan.quintela/qemu: (30 commits)
  migration: Create migrate_max_bandwidth() function
  migration: Move migrate_postcopy() to options.c
  migration: Create migrate_cpu_throttle_tailslow() function
  migration: Create migrate_cpu_throttle_increment() function
  migration: Create  migrate_cpu_throttle_initial() to option.c
  migration: Move migrate_announce_params() to option.c
  migration: Create migrate_max_cpu_throttle()
  migration: Create migrate_checkpoint_delay()
  migration: Create migrate_throttle_trigger_threshold()
  migration: Move migrate_use_block_incremental() to option.c
  migration: Use migrate_max_postcopy_bandwidth()
  migration: Move parameters functions to option.c
  migration: Move migrate_cap_set() to options.c
  migration: Move qmp_migrate_set_capabilities() to options.c
  migration: Move qmp_query_migrate_capabilities() to options.c
  migration: Move migrate_caps_check() to options.c
  migration: Create migrate_rdma_pin_all() function
  migration: Move migrate_use_return() to options.c
  migration: Move migrate_use_block() to options.c
  migration: Move migrate_use_xbzrle() to options.c
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
master
Richard Henderson 2023-04-24 15:00:39 +01:00
parent 81072abf15 9c894df3a3
commit ac5f7bf8e2
23 changed files with 971 additions and 832 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
hw/virtio/virtio-balloon.c
View File

@ -32,6 +32,7 @@
#include "qemu/error-report.h"
#include "migration/misc.h"
#include "migration/migration.h"
#include "migration/options.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-access.h"

1
include/migration/misc.h
View File

@ -66,7 +66,6 @@ bool migration_has_finished(MigrationState *);
bool migration_has_failed(MigrationState *);
/* ...and after the device transmission */
bool migration_in_postcopy_after_devices(MigrationState *);
void migration_global_dump(Monitor *mon);
/* True if incoming migration entered POSTCOPY_INCOMING_DISCARD */
bool migration_in_incoming_postcopy(void);
/* True if incoming migration entered POSTCOPY_INCOMING_ADVISE */

1
migration/block-dirty-bitmap.c
View File

@ -79,6 +79,7 @@
#include "qapi/qapi-visit-migration.h"
#include "qapi/clone-visitor.h"
#include "trace.h"
#include "options.h"
#define CHUNK_SIZE (1 << 10)

5
migration/block.c
View File

@ -28,6 +28,7 @@
#include "migration/vmstate.h"
#include "sysemu/block-backend.h"
#include "trace.h"
#include "options.h"
#define BLK_MIG_BLOCK_SIZE (1ULL << 20)
#define BDRV_SECTORS_PER_DIRTY_CHUNK (BLK_MIG_BLOCK_SIZE >> BDRV_SECTOR_BITS)
@ -416,7 +417,7 @@ static int init_blk_migration(QEMUFile *f)
bmds->bulk_completed = 0;
bmds->total_sectors = sectors;
bmds->completed_sectors = 0;
bmds->shared_base = migrate_use_block_incremental();
bmds->shared_base = migrate_block_incremental();
assert(i < num_bs);
bmds_bs[i].bmds = bmds;
@ -1000,7 +1001,7 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
static bool block_is_active(void *opaque)
{
return migrate_use_block();
return migrate_block();
}
static SaveVMHandlers savevm_block_handlers = {

6
migration/colo.c
View File

@ -36,6 +36,7 @@
#include "sysemu/cpus.h"
#include "sysemu/runstate.h"
#include "net/filter.h"
#include "options.h"
static bool vmstate_loading;
static Notifier packets_compare_notifier;
@ -575,7 +576,7 @@ static void colo_process_checkpoint(MigrationState *s)
trace_colo_vm_state_change("stop", "run");
timer_mod(s->colo_delay_timer, qemu_clock_get_ms(QEMU_CLOCK_HOST) +
s->parameters.x_checkpoint_delay);
migrate_checkpoint_delay());
while (s->state == MIGRATION_STATUS_COLO) {
if (failover_get_state() != FAILOVER_STATUS_NONE) {
@ -650,8 +651,7 @@ void colo_checkpoint_notify(void *opaque)
qemu_event_set(&s->colo_checkpoint_event);
s->colo_checkpoint_time = qemu_clock_get_ms(QEMU_CLOCK_HOST);
next_notify_time = s->colo_checkpoint_time +
s->parameters.x_checkpoint_delay;
next_notify_time = s->colo_checkpoint_time + migrate_checkpoint_delay();
timer_mod(s->colo_delay_timer, next_notify_time);
}

1
migration/meson.build
View File

@ -22,6 +22,7 @@ softmmu_ss.add(files(
'migration.c',
'multifd.c',
'multifd-zlib.c',
'options.c',
'postcopy-ram.c',
'savevm.c',
'socket.c',

39
migration/migration-hmp-cmds.c
View File

@ -15,7 +15,6 @@
#include "qemu/osdep.h"
#include "block/qapi.h"
#include "migration/misc.h"
#include "migration/snapshot.h"
#include "monitor/hmp.h"
#include "monitor/monitor.h"
@ -30,6 +29,27 @@
#include "qemu/sockets.h"
#include "sysemu/runstate.h"
#include "ui/qemu-spice.h"
#include "sysemu/sysemu.h"
#include "migration.h"
static void migration_global_dump(Monitor *mon)
{
MigrationState *ms = migrate_get_current();
monitor_printf(mon, "globals:\n");
monitor_printf(mon, "store-global-state: %s\n",
ms->store_global_state ? "on" : "off");
monitor_printf(mon, "only-migratable: %s\n",
only_migratable ? "on" : "off");
monitor_printf(mon, "send-configuration: %s\n",
ms->send_configuration ? "on" : "off");
monitor_printf(mon, "send-section-footer: %s\n",
ms->send_section_footer ? "on" : "off");
monitor_printf(mon, "decompress-error-check: %s\n",
ms->decompress_error_check ? "on" : "off");
monitor_printf(mon, "clear-bitmap-shift: %u\n",
ms->clear_bitmap_shift);
}
void hmp_info_migrate(Monitor *mon, const QDict *qdict)
{
@ -616,23 +636,6 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict)
hmp_handle_error(mon, err);
}
void hmp_client_migrate_info(Monitor *mon, const QDict *qdict)
{
Error *err = NULL;
const char *protocol = qdict_get_str(qdict, "protocol");
const char *hostname = qdict_get_str(qdict, "hostname");
bool has_port = qdict_haskey(qdict, "port");
int port = qdict_get_try_int(qdict, "port", -1);
bool has_tls_port = qdict_haskey(qdict, "tls-port");
int tls_port = qdict_get_try_int(qdict, "tls-port", -1);
const char *cert_subject = qdict_get_try_str(qdict, "cert-subject");
qmp_client_migrate_info(protocol, hostname,
has_port, port, has_tls_port, tls_port,
cert_subject, &err);
hmp_handle_error(mon, err);
}
void hmp_migrate_start_postcopy(Monitor *mon, const QDict *qdict)
{
Error *err = NULL;

719
migration/migration.c
View File

@ -63,7 +63,7 @@
#include "sysemu/cpus.h"
#include "yank_functions.h"
#include "sysemu/qtest.h"
#include "ui/qemu-spice.h"
#include "options.h"
#define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */
@ -136,39 +136,6 @@ enum mig_rp_message_type {
MIG_RP_MSG_MAX
};
/* Migration capabilities set */
struct MigrateCapsSet {
int size; /* Capability set size */
MigrationCapability caps[]; /* Variadic array of capabilities */
};
typedef struct MigrateCapsSet MigrateCapsSet;
/* Define and initialize MigrateCapsSet */
#define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \
MigrateCapsSet _name = { \
.size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \
.caps = { __VA_ARGS__ } \
}
/* Background-snapshot compatibility check list */
static const
INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot,
MIGRATION_CAPABILITY_POSTCOPY_RAM,
MIGRATION_CAPABILITY_DIRTY_BITMAPS,
MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME,
MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE,
MIGRATION_CAPABILITY_RETURN_PATH,
MIGRATION_CAPABILITY_MULTIFD,
MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER,
MIGRATION_CAPABILITY_AUTO_CONVERGE,
MIGRATION_CAPABILITY_RELEASE_RAM,
MIGRATION_CAPABILITY_RDMA_PIN_ALL,
MIGRATION_CAPABILITY_COMPRESS,
MIGRATION_CAPABILITY_XBZRLE,
MIGRATION_CAPABILITY_X_COLO,
MIGRATION_CAPABILITY_VALIDATE_UUID,
MIGRATION_CAPABILITY_ZERO_COPY_SEND);
/* When we add fault tolerance, we could have several
migrations at once. For now we don't need to add
dynamic creation of migration */
@ -186,7 +153,7 @@ static void migrate_fd_cancel(MigrationState *s);
static bool migration_needs_multiple_sockets(void)
{
return migrate_use_multifd() || migrate_postcopy_preempt();
return migrate_multifd() || migrate_postcopy_preempt();
}
static bool uri_supports_multi_channels(const char *uri)
@ -353,20 +320,11 @@ void migration_incoming_state_destroy(void)
static void migrate_generate_event(int new_state)
{
if (migrate_use_events()) {
if (migrate_events()) {
qapi_event_send_migration(new_state);
}
}
static bool migrate_late_block_activate(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE];
}
/*
* Send a message on the return channel back to the source
* of the migration.
@ -741,7 +699,7 @@ void migration_fd_process_incoming(QEMUFile *f, Error **errp)
static bool migration_should_start_incoming(bool main_channel)
{
/* Multifd doesn't start unless all channels are established */
if (migrate_use_multifd()) {
if (migrate_multifd()) {
return migration_has_all_channels();
}
@ -768,7 +726,7 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp)
uint32_t channel_magic = 0;
int ret = 0;
if (migrate_use_multifd() && !migrate_postcopy_ram() &&
if (migrate_multifd() && !migrate_postcopy_ram() &&
qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_READ_MSG_PEEK)) {
/*
* With multiple channels, it is possible that we receive channels
@ -807,7 +765,7 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp)
} else {
/* Multiple connections */
assert(migration_needs_multiple_sockets());
if (migrate_use_multifd()) {
if (migrate_multifd()) {
multifd_recv_new_channel(ioc, &local_err);
} else {
assert(migrate_postcopy_preempt());
@ -843,7 +801,7 @@ bool migration_has_all_channels(void)
return false;
}
if (migrate_use_multifd()) {
if (migrate_multifd()) {
return multifd_recv_all_channels_created();
}
@ -928,139 +886,6 @@ void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value)
migrate_send_rp_message(mis, MIG_RP_MSG_RESUME_ACK, sizeof(buf), &buf);
}
MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp)
{
MigrationCapabilityStatusList *head = NULL, **tail = &head;
MigrationCapabilityStatus *caps;
MigrationState *s = migrate_get_current();
int i;
for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
#ifndef CONFIG_LIVE_BLOCK_MIGRATION
if (i == MIGRATION_CAPABILITY_BLOCK) {
continue;
}
#endif
caps = g_malloc0(sizeof(*caps));
caps->capability = i;
caps->state = s->capabilities[i];
QAPI_LIST_APPEND(tail, caps);
}
return head;
}
MigrationParameters *qmp_query_migrate_parameters(Error **errp)
{
MigrationParameters *params;
MigrationState *s = migrate_get_current();
/* TODO use QAPI_CLONE() instead of duplicating it inline */
params = g_malloc0(sizeof(*params));
params->has_compress_level = true;
params->compress_level = s->parameters.compress_level;
params->has_compress_threads = true;
params->compress_threads = s->parameters.compress_threads;
params->has_compress_wait_thread = true;
params->compress_wait_thread = s->parameters.compress_wait_thread;
params->has_decompress_threads = true;
params->decompress_threads = s->parameters.decompress_threads;
params->has_throttle_trigger_threshold = true;
params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold;
params->has_cpu_throttle_initial = true;
params->cpu_throttle_initial = s->parameters.cpu_throttle_initial;
params->has_cpu_throttle_increment = true;
params->cpu_throttle_increment = s->parameters.cpu_throttle_increment;
params->has_cpu_throttle_tailslow = true;
params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow;
params->tls_creds = g_strdup(s->parameters.tls_creds);
params->tls_hostname = g_strdup(s->parameters.tls_hostname);
params->tls_authz = g_strdup(s->parameters.tls_authz ?
s->parameters.tls_authz : "");
params->has_max_bandwidth = true;
params->max_bandwidth = s->parameters.max_bandwidth;
params->has_downtime_limit = true;
params->downtime_limit = s->parameters.downtime_limit;
params->has_x_checkpoint_delay = true;
params->x_checkpoint_delay = s->parameters.x_checkpoint_delay;
params->has_block_incremental = true;
params->block_incremental = s->parameters.block_incremental;
params->has_multifd_channels = true;
params->multifd_channels = s->parameters.multifd_channels;
params->has_multifd_compression = true;
params->multifd_compression = s->parameters.multifd_compression;
params->has_multifd_zlib_level = true;
params->multifd_zlib_level = s->parameters.multifd_zlib_level;
params->has_multifd_zstd_level = true;
params->multifd_zstd_level = s->parameters.multifd_zstd_level;
params->has_xbzrle_cache_size = true;
params->xbzrle_cache_size = s->parameters.xbzrle_cache_size;
params->has_max_postcopy_bandwidth = true;
params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth;
params->has_max_cpu_throttle = true;
params->max_cpu_throttle = s->parameters.max_cpu_throttle;
params->has_announce_initial = true;
params->announce_initial = s->parameters.announce_initial;
params->has_announce_max = true;
params->announce_max = s->parameters.announce_max;
params->has_announce_rounds = true;
params->announce_rounds = s->parameters.announce_rounds;
params->has_announce_step = true;
params->announce_step = s->parameters.announce_step;
if (s->parameters.has_block_bitmap_mapping) {
params->has_block_bitmap_mapping = true;
params->block_bitmap_mapping =
QAPI_CLONE(BitmapMigrationNodeAliasList,
s->parameters.block_bitmap_mapping);
}
return params;
}
void qmp_client_migrate_info(const char *protocol, const char *hostname,
bool has_port, int64_t port,
bool has_tls_port, int64_t tls_port,
const char *cert_subject,
Error **errp)
{
if (strcmp(protocol, "spice") == 0) {
if (!qemu_using_spice(errp)) {
return;
}
if (!has_port && !has_tls_port) {
error_setg(errp, QERR_MISSING_PARAMETER, "port/tls-port");
return;
}
if (qemu_spice.migrate_info(hostname,
has_port ? port : -1,
has_tls_port ? tls_port : -1,
cert_subject)) {
error_setg(errp, "Could not set up display for migration");
return;
}
return;
}
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "protocol", "'spice'");
}
AnnounceParameters *migrate_announce_params(void)
{
static AnnounceParameters ap;
MigrationState *s = migrate_get_current();
ap.initial = s->parameters.announce_initial;
ap.max = s->parameters.announce_max;
ap.rounds = s->parameters.announce_rounds;
ap.step = s->parameters.announce_step;
return &ap;
}
/*
* Return true if we're already in the middle of a migration
* (i.e. any of the active or setup states)
@ -1160,7 +985,7 @@ static void populate_ram_info(MigrationInfo *info, MigrationState *s)
info->ram->downtime_bytes = stat64_get(&ram_counters.downtime_bytes);
info->ram->postcopy_bytes = stat64_get(&ram_counters.postcopy_bytes);
if (migrate_use_xbzrle()) {
if (migrate_xbzrle()) {
info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache));
info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size();
info->xbzrle_cache->bytes = xbzrle_counters.bytes;
@ -1171,7 +996,7 @@ static void populate_ram_info(MigrationInfo *info, MigrationState *s)
info->xbzrle_cache->overflow = xbzrle_counters.overflow;
}
if (migrate_use_compression()) {
if (migrate_compress()) {
info->compression = g_malloc0(sizeof(*info->compression));
info->compression->pages = compression_counters.pages;
info->compression->busy = compression_counters.busy;
@ -1273,163 +1098,6 @@ static void fill_source_migration_info(MigrationInfo *info)
info->status = state;
}
typedef enum WriteTrackingSupport {
WT_SUPPORT_UNKNOWN = 0,
WT_SUPPORT_ABSENT,
WT_SUPPORT_AVAILABLE,
WT_SUPPORT_COMPATIBLE
} WriteTrackingSupport;
static
WriteTrackingSupport migrate_query_write_tracking(void)
{
/* Check if kernel supports required UFFD features */
if (!ram_write_tracking_available()) {
return WT_SUPPORT_ABSENT;
}
/*
* Check if current memory configuration is
* compatible with required UFFD features.
*/
if (!ram_write_tracking_compatible()) {
return WT_SUPPORT_AVAILABLE;
}
return WT_SUPPORT_COMPATIBLE;
}
/**
* @migration_caps_check - check capability compatibility
*
* @old_caps: old capability list
* @new_caps: new capability list
* @errp: set *errp if the check failed, with reason
*
* Returns true if check passed, otherwise false.
*/
static bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
{
MigrationIncomingState *mis = migration_incoming_get_current();
#ifndef CONFIG_LIVE_BLOCK_MIGRATION
if (new_caps[MIGRATION_CAPABILITY_BLOCK]) {
error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) "
"block migration");
error_append_hint(errp, "Use drive_mirror+NBD instead.\n");
return false;
}
#endif
#ifndef CONFIG_REPLICATION
if (new_caps[MIGRATION_CAPABILITY_X_COLO]) {
error_setg(errp, "QEMU compiled without replication module"
" can't enable COLO");
error_append_hint(errp, "Please enable replication before COLO.\n");
return false;
}
#endif
if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
/* This check is reasonably expensive, so only when it's being
* set the first time, also it's only the destination that needs
* special support.
*/
if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] &&
runstate_check(RUN_STATE_INMIGRATE) &&
!postcopy_ram_supported_by_host(mis)) {
/* postcopy_ram_supported_by_host will have emitted a more
* detailed message
*/
error_setg(errp, "Postcopy is not supported");
return false;
}
if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) {
error_setg(errp, "Postcopy is not compatible with ignore-shared");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) {
WriteTrackingSupport wt_support;
int idx;
/*
* Check if 'background-snapshot' capability is supported by
* host kernel and compatible with guest memory configuration.
*/
wt_support = migrate_query_write_tracking();
if (wt_support < WT_SUPPORT_AVAILABLE) {
error_setg(errp, "Background-snapshot is not supported by host kernel");
return false;
}
if (wt_support < WT_SUPPORT_COMPATIBLE) {
error_setg(errp, "Background-snapshot is not compatible "
"with guest memory configuration");
return false;
}
/*
* Check if there are any migration capabilities
* incompatible with 'background-snapshot'.
*/
for (idx = 0; idx < check_caps_background_snapshot.size; idx++) {
int incomp_cap = check_caps_background_snapshot.caps[idx];
if (new_caps[incomp_cap]) {
error_setg(errp,
"Background-snapshot is not compatible with %s",
MigrationCapability_str(incomp_cap));
return false;
}
}
}
#ifdef CONFIG_LINUX
if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] &&
(!new_caps[MIGRATION_CAPABILITY_MULTIFD] ||
new_caps[MIGRATION_CAPABILITY_COMPRESS] ||
new_caps[MIGRATION_CAPABILITY_XBZRLE] ||
migrate_multifd_compression() ||
migrate_use_tls())) {
error_setg(errp,
"Zero copy only available for non-compressed non-TLS multifd migration");
return false;
}
#else
if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) {
error_setg(errp,
"Zero copy currently only available on Linux");
return false;
}
#endif
if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) {
if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
error_setg(errp, "Postcopy preempt requires postcopy-ram");
return false;
}
/*
* Preempt mode requires urgent pages to be sent in separate
* channel, OTOH compression logic will disorder all pages into
* different compression channels, which is not compatible with the
* preempt assumptions on channel assignments.
*/
if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
error_setg(errp, "Postcopy preempt not compatible with compress");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) {
if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
error_setg(errp, "Multifd is not compatible with compress");
return false;
}
}
return true;
}
static void fill_destination_migration_info(MigrationInfo *info)
{
MigrationIncomingState *mis = migration_incoming_get_current();
@ -1472,32 +1140,6 @@ MigrationInfo *qmp_query_migrate(Error **errp)
return info;
}
void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
Error **errp)
{
MigrationState *s = migrate_get_current();
MigrationCapabilityStatusList *cap;
bool new_caps[MIGRATION_CAPABILITY__MAX];
if (migration_is_running(s->state)) {
error_setg(errp, QERR_MIGRATION_ACTIVE);
return;
}
memcpy(new_caps, s->capabilities, sizeof(new_caps));
for (cap = params; cap; cap = cap->next) {
new_caps[cap->value->capability] = cap->value->state;
}
if (!migrate_caps_check(s->capabilities, new_caps, errp)) {
return;
}
for (cap = params; cap; cap = cap->next) {
s->capabilities[cap->value->capability] = cap->value->state;
}
}
/*
* Check whether the parameters are valid. Error will be put into errp
* (if provided). Return true if valid, otherwise false.
@ -1647,7 +1289,7 @@ static bool migrate_params_check(MigrationParameters *params, Error **errp)
}
#ifdef CONFIG_LINUX
if (migrate_use_zero_copy_send() &&
if (migrate_zero_copy_send() &&
((params->has_multifd_compression && params->multifd_compression) ||
(params->tls_creds && *params->tls_creds))) {
error_setg(errp,
@ -1942,27 +1584,6 @@ void migrate_set_state(int *state, int old_state, int new_state)
}
}
static MigrationCapabilityStatus *migrate_cap_add(MigrationCapability index,
bool state)
{
MigrationCapabilityStatus *cap;
cap = g_new0(MigrationCapabilityStatus, 1);
cap->capability = index;
cap->state = state;
return cap;
}
void migrate_set_block_enabled(bool value, Error **errp)
{
MigrationCapabilityStatusList *cap = NULL;
QAPI_LIST_PREPEND(cap, migrate_cap_add(MIGRATION_CAPABILITY_BLOCK, value));
qmp_migrate_set_capabilities(cap, errp);
qapi_free_MigrationCapabilityStatusList(cap);
}
static void migrate_set_block_incremental(MigrationState *s, bool value)
{
s->parameters.block_incremental = value;
@ -1972,7 +1593,7 @@ static void block_cleanup_parameters(MigrationState *s)
{
if (s->must_remove_block_options) {
/* setting to false can never fail */
migrate_set_block_enabled(false, &error_abort);
migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, false, &error_abort);
migrate_set_block_incremental(s, false);
s->must_remove_block_options = false;
}
@ -2450,17 +2071,16 @@ static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc,
}
if (blk || blk_inc) {
if (migrate_colo_enabled()) {
if (migrate_colo()) {
error_setg(errp, "No disk migration is required in COLO mode");
return false;
}
if (migrate_use_block() || migrate_use_block_incremental()) {
if (migrate_block() || migrate_block_incremental()) {
error_setg(errp, "Command options are incompatible with "
"current migration capabilities");
return false;
}
migrate_set_block_enabled(true, &local_err);
if (local_err) {
if (!migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, true, &local_err)) {
error_propagate(errp, local_err);
return false;
}
@ -2557,203 +2177,6 @@ void qmp_migrate_continue(MigrationStatus state, Error **errp)
qemu_sem_post(&s->pause_sem);
}
bool migrate_release_ram(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM];
}
bool migrate_postcopy_ram(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM];
}
bool migrate_postcopy(void)
{
return migrate_postcopy_ram() || migrate_dirty_bitmaps();
}
bool migrate_auto_converge(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE];
}
bool migrate_zero_blocks(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
}
bool migrate_postcopy_blocktime(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
}
bool migrate_use_compression(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_COMPRESS];
}
int migrate_compress_level(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.compress_level;
}
int migrate_compress_threads(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.compress_threads;
}
int migrate_compress_wait_thread(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.compress_wait_thread;
}
int migrate_decompress_threads(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.decompress_threads;
}
bool migrate_dirty_bitmaps(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS];
}
bool migrate_ignore_shared(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED];
}
bool migrate_validate_uuid(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID];
}
bool migrate_use_events(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_EVENTS];
}
bool migrate_use_multifd(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_MULTIFD];
}
bool migrate_pause_before_switchover(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER];
}
int migrate_multifd_channels(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.multifd_channels;
}
MultiFDCompression migrate_multifd_compression(void)
{
MigrationState *s;
s = migrate_get_current();
assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX);
return s->parameters.multifd_compression;
}
int migrate_multifd_zlib_level(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.multifd_zlib_level;
}
int migrate_multifd_zstd_level(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.multifd_zstd_level;
}
#ifdef CONFIG_LINUX
bool migrate_use_zero_copy_send(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND];
}
#endif
int migrate_use_tls(void)
{
MigrationState *s;
@ -2763,78 +2186,6 @@ int migrate_use_tls(void)
return s->parameters.tls_creds && *s->parameters.tls_creds;
}
int migrate_use_xbzrle(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_XBZRLE];
}
uint64_t migrate_xbzrle_cache_size(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.xbzrle_cache_size;
}
static int64_t migrate_max_postcopy_bandwidth(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.max_postcopy_bandwidth;
}
bool migrate_use_block(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_BLOCK];
}
bool migrate_use_return_path(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH];
}
bool migrate_use_block_incremental(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.block_incremental;
}
bool migrate_background_snapshot(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT];
}
bool migrate_postcopy_preempt(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT];
}
/* migration thread support */
/*
* Something bad happened to the RP stream, mark an error
@ -3431,7 +2782,6 @@ static void migration_completion(MigrationState *s)
ret = global_state_store();
if (!ret) {
bool inactivate = !migrate_colo_enabled();
ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
trace_migration_completion_vm_stop(ret);
if (ret >= 0) {
@ -3439,10 +2789,10 @@ static void migration_completion(MigrationState *s)
MIGRATION_STATUS_DEVICE);
}
if (ret >= 0) {
s->block_inactive = inactivate;
s->block_inactive = !migrate_colo();
qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX);
ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false,
inactivate);
s->block_inactive);
}
}
qemu_mutex_unlock_iothread();
@ -3492,7 +2842,7 @@ static void migration_completion(MigrationState *s)
goto fail_invalidate;
}
if (migrate_colo_enabled() && s->state == MIGRATION_STATUS_ACTIVE) {
if (migrate_colo() && s->state == MIGRATION_STATUS_ACTIVE) {
/* COLO does not support postcopy */
migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE,
MIGRATION_STATUS_COLO);
@ -3571,12 +2921,6 @@ fail:
MIGRATION_STATUS_FAILED);
}
bool migrate_colo_enabled(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_X_COLO];
}
typedef enum MigThrError {
/* No error detected */
MIG_THR_ERR_NONE = 0,
@ -3907,7 +3251,7 @@ static void migration_iteration_finish(MigrationState *s)
runstate_set(RUN_STATE_POSTMIGRATE);
break;
case MIGRATION_STATUS_COLO:
if (!migrate_colo_enabled()) {
if (!migrate_colo()) {
error_report("%s: critical error: calling COLO code without "
"COLO enabled", __func__);
}
@ -4103,7 +3447,7 @@ static void *migration_thread(void *opaque)
qemu_savevm_send_postcopy_advise(s->to_dst_file);
}
if (migrate_colo_enabled()) {
if (migrate_colo()) {
/* Notify migration destination that we enable COLO */
qemu_savevm_send_colo_enable(s->to_dst_file);
}
@ -4355,11 +3699,11 @@ void migrate_fd_connect(MigrationState *s, Error *error_in)
if (resume) {
/* This is a resumed migration */
rate_limit = s->parameters.max_postcopy_bandwidth /
rate_limit = migrate_max_postcopy_bandwidth() /
XFER_LIMIT_RATIO;
} else {
/* This is a fresh new migration */
rate_limit = s->parameters.max_bandwidth / XFER_LIMIT_RATIO;
rate_limit = migrate_max_bandwidth() / XFER_LIMIT_RATIO;
/* Notify before starting migration thread */
notifier_list_notify(&migration_state_notifiers, s);
@ -4373,7 +3717,7 @@ void migrate_fd_connect(MigrationState *s, Error *error_in)
* precopy, only if user specified "return-path" capability would
* QEMU uses the return path.
*/
if (migrate_postcopy_ram() || migrate_use_return_path()) {
if (migrate_postcopy_ram() || migrate_return_path()) {
if (open_return_path_on_source(s, !resume)) {
error_report("Unable to open return-path for postcopy");
migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED);
@ -4417,25 +3761,6 @@ void migrate_fd_connect(MigrationState *s, Error *error_in)
s->migration_thread_running = true;
}
void migration_global_dump(Monitor *mon)
{
MigrationState *ms = migrate_get_current();
monitor_printf(mon, "globals:\n");
monitor_printf(mon, "store-global-state: %s\n",
ms->store_global_state ? "on" : "off");
monitor_printf(mon, "only-migratable: %s\n",
only_migratable ? "on" : "off");
monitor_printf(mon, "send-configuration: %s\n",
ms->send_configuration ? "on" : "off");
monitor_printf(mon, "send-section-footer: %s\n",
ms->send_section_footer ? "on" : "off");
monitor_printf(mon, "decompress-error-check: %s\n",
ms->decompress_error_check ? "on" : "off");
monitor_printf(mon, "clear-bitmap-shift: %u\n",
ms->clear_bitmap_shift);
}
#define DEFINE_PROP_MIG_CAP(name, x) \
DEFINE_PROP_BOOL(name, MigrationState, capabilities[x], false)

40
migration/migration.h
View File

@ -447,50 +447,10 @@ bool migration_is_blocked(Error **errp);
bool migration_in_postcopy(void);
MigrationState *migrate_get_current(void);
bool migrate_postcopy(void);
bool migrate_release_ram(void);
bool migrate_postcopy_ram(void);
bool migrate_zero_blocks(void);
bool migrate_dirty_bitmaps(void);
bool migrate_ignore_shared(void);
bool migrate_validate_uuid(void);
bool migrate_auto_converge(void);
bool migrate_use_multifd(void);
bool migrate_pause_before_switchover(void);
int migrate_multifd_channels(void);
MultiFDCompression migrate_multifd_compression(void);
int migrate_multifd_zlib_level(void);
int migrate_multifd_zstd_level(void);
#ifdef CONFIG_LINUX
bool migrate_use_zero_copy_send(void);
#else
#define migrate_use_zero_copy_send() (false)
#endif
int migrate_use_tls(void);
int migrate_use_xbzrle(void);
uint64_t migrate_xbzrle_cache_size(void);
bool migrate_colo_enabled(void);
bool migrate_use_block(void);
bool migrate_use_block_incremental(void);
int migrate_max_cpu_throttle(void);
bool migrate_use_return_path(void);
uint64_t ram_get_total_transferred_pages(void);
bool migrate_use_compression(void);
int migrate_compress_level(void);
int migrate_compress_threads(void);
int migrate_compress_wait_thread(void);
int migrate_decompress_threads(void);
bool migrate_use_events(void);
bool migrate_postcopy_blocktime(void);
bool migrate_background_snapshot(void);
bool migrate_postcopy_preempt(void);
/* Sending on the return path - generic and then for each message type */
void migrate_send_rp_shut(MigrationIncomingState *mis,
uint32_t value);

1
migration/multifd-zlib.c
View File

@ -18,6 +18,7 @@
#include "qapi/error.h"
#include "migration.h"
#include "trace.h"
#include "options.h"
#include "multifd.h"
struct zlib_data {

1
migration/multifd-zstd.c
View File

@ -18,6 +18,7 @@
#include "qapi/error.h"
#include "migration.h"
#include "trace.h"
#include "options.h"
#include "multifd.h"
struct zstd_data {

24
migration/multifd.c
View File

@ -25,7 +25,7 @@
#include "trace.h"
#include "multifd.h"
#include "threadinfo.h"
#include "options.h"
#include "qemu/yank.h"
#include "io/channel-socket.h"
#include "yank_functions.h"
@ -516,7 +516,7 @@ void multifd_save_cleanup(void)
{
int i;
if (!migrate_use_multifd()) {
if (!migrate_multifd()) {
return;
}
multifd_send_terminate_threads(NULL);
@ -587,7 +587,7 @@ int multifd_send_sync_main(QEMUFile *f)
int i;
bool flush_zero_copy;
if (!migrate_use_multifd()) {
if (!migrate_multifd()) {
return 0;
}
if (multifd_send_state->pages->num) {
@ -608,7 +608,7 @@ int multifd_send_sync_main(QEMUFile *f)
* all the dirty bitmaps.
*/
flush_zero_copy = migrate_use_zero_copy_send();
flush_zero_copy = migrate_zero_copy_send();
for (i = 0; i < migrate_multifd_channels(); i++) {
MultiFDSendParams *p = &multifd_send_state->params[i];
@ -653,7 +653,7 @@ static void *multifd_send_thread(void *opaque)
MigrationThread *thread = NULL;
Error *local_err = NULL;
int ret = 0;
bool use_zero_copy_send = migrate_use_zero_copy_send();
bool use_zero_copy_send = migrate_zero_copy_send();
thread = MigrationThreadAdd(p->name, qemu_get_thread_id());
@ -911,7 +911,7 @@ int multifd_save_setup(Error **errp)
uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size();
uint8_t i;
if (!migrate_use_multifd()) {
if (!migrate_multifd()) {
return 0;
}
@ -945,7 +945,7 @@ int multifd_save_setup(Error **errp)
p->page_size = qemu_target_page_size();
p->page_count = page_count;
if (migrate_use_zero_copy_send()) {
if (migrate_zero_copy_send()) {
p->write_flags = QIO_CHANNEL_WRITE_FLAG_ZERO_COPY;
} else {
p->write_flags = 0;
@ -1016,7 +1016,7 @@ static void multifd_recv_terminate_threads(Error *err)
void multifd_load_shutdown(void)
{
if (migrate_use_multifd()) {
if (migrate_multifd()) {
multifd_recv_terminate_threads(NULL);
}
}
@ -1025,7 +1025,7 @@ void multifd_load_cleanup(void)
{
int i;
if (!migrate_use_multifd()) {
if (!migrate_multifd()) {
return;
}
multifd_recv_terminate_threads(NULL);
@ -1072,7 +1072,7 @@ void multifd_recv_sync_main(void)
{
int i;
if (!migrate_use_multifd()) {
if (!migrate_multifd()) {
return;
}
for (i = 0; i < migrate_multifd_channels(); i++) {
@ -1170,7 +1170,7 @@ int multifd_load_setup(Error **errp)
* Return successfully if multiFD recv state is already initialised
* or multiFD is not enabled.
*/
if (multifd_recv_state || !migrate_use_multifd()) {
if (multifd_recv_state || !migrate_multifd()) {
return 0;
}
@ -1216,7 +1216,7 @@ bool multifd_recv_all_channels_created(void)
{
int thread_count = migrate_multifd_channels();
if (!migrate_use_multifd()) {
if (!migrate_multifd()) {
return true;
}

722
migration/options.c Normal file
View File

@ -0,0 +1,722 @@
/*
* QEMU migration capabilities
*
* Copyright (c) 2012-2023 Red Hat Inc
*
* Authors:
* Orit Wasserman <owasserm@redhat.com>
* Juan Quintela <quintela@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/clone-visitor.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-migration.h"
#include "qapi/qapi-visit-migration.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/runstate.h"
#include "migration/misc.h"
#include "migration.h"
#include "ram.h"
#include "options.h"
bool migrate_auto_converge(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE];
}
bool migrate_background_snapshot(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT];
}
bool migrate_block(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_BLOCK];
}
bool migrate_colo(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_X_COLO];
}
bool migrate_compress(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_COMPRESS];
}
bool migrate_dirty_bitmaps(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS];
}
bool migrate_events(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_EVENTS];
}
bool migrate_ignore_shared(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED];
}
bool migrate_late_block_activate(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE];
}
bool migrate_multifd(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_MULTIFD];
}
bool migrate_pause_before_switchover(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER];
}
bool migrate_postcopy_blocktime(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
}
bool migrate_postcopy_preempt(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT];
}
bool migrate_postcopy_ram(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM];
}
bool migrate_rdma_pin_all(void)
{
MigrationState *s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL];
}
bool migrate_release_ram(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM];
}
bool migrate_return_path(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH];
}
bool migrate_validate_uuid(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID];
}
bool migrate_xbzrle(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_XBZRLE];
}
bool migrate_zero_blocks(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
}
bool migrate_zero_copy_send(void)
{
MigrationState *s;
s = migrate_get_current();
return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND];
}
/* pseudo capabilities */
bool migrate_postcopy(void)
{
return migrate_postcopy_ram() || migrate_dirty_bitmaps();
}
typedef enum WriteTrackingSupport {
WT_SUPPORT_UNKNOWN = 0,
WT_SUPPORT_ABSENT,
WT_SUPPORT_AVAILABLE,
WT_SUPPORT_COMPATIBLE
} WriteTrackingSupport;
static
WriteTrackingSupport migrate_query_write_tracking(void)
{
/* Check if kernel supports required UFFD features */
if (!ram_write_tracking_available()) {
return WT_SUPPORT_ABSENT;
}
/*
* Check if current memory configuration is
* compatible with required UFFD features.
*/
if (!ram_write_tracking_compatible()) {
return WT_SUPPORT_AVAILABLE;
}
return WT_SUPPORT_COMPATIBLE;
}
/* Migration capabilities set */
struct MigrateCapsSet {
int size; /* Capability set size */
MigrationCapability caps[]; /* Variadic array of capabilities */
};
typedef struct MigrateCapsSet MigrateCapsSet;
/* Define and initialize MigrateCapsSet */
#define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \
MigrateCapsSet _name = { \
.size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \
.caps = { __VA_ARGS__ } \
}
/* Background-snapshot compatibility check list */
static const
INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot,
MIGRATION_CAPABILITY_POSTCOPY_RAM,
MIGRATION_CAPABILITY_DIRTY_BITMAPS,
MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME,
MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE,
MIGRATION_CAPABILITY_RETURN_PATH,
MIGRATION_CAPABILITY_MULTIFD,
MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER,
MIGRATION_CAPABILITY_AUTO_CONVERGE,
MIGRATION_CAPABILITY_RELEASE_RAM,
MIGRATION_CAPABILITY_RDMA_PIN_ALL,
MIGRATION_CAPABILITY_COMPRESS,
MIGRATION_CAPABILITY_XBZRLE,
MIGRATION_CAPABILITY_X_COLO,
MIGRATION_CAPABILITY_VALIDATE_UUID,
MIGRATION_CAPABILITY_ZERO_COPY_SEND);
/**
* @migration_caps_check - check capability compatibility
*
* @old_caps: old capability list
* @new_caps: new capability list
* @errp: set *errp if the check failed, with reason
*
* Returns true if check passed, otherwise false.
*/
bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
{
MigrationIncomingState *mis = migration_incoming_get_current();
#ifndef CONFIG_LIVE_BLOCK_MIGRATION
if (new_caps[MIGRATION_CAPABILITY_BLOCK]) {
error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) "
"block migration");
error_append_hint(errp, "Use drive_mirror+NBD instead.\n");
return false;
}
#endif
#ifndef CONFIG_REPLICATION
if (new_caps[MIGRATION_CAPABILITY_X_COLO]) {
error_setg(errp, "QEMU compiled without replication module"
" can't enable COLO");
error_append_hint(errp, "Please enable replication before COLO.\n");
return false;
}
#endif
if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
/* This check is reasonably expensive, so only when it's being
* set the first time, also it's only the destination that needs
* special support.
*/
if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] &&
runstate_check(RUN_STATE_INMIGRATE) &&
!postcopy_ram_supported_by_host(mis)) {
/* postcopy_ram_supported_by_host will have emitted a more
* detailed message
*/
error_setg(errp, "Postcopy is not supported");
return false;
}
if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) {
error_setg(errp, "Postcopy is not compatible with ignore-shared");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) {
WriteTrackingSupport wt_support;
int idx;
/*
* Check if 'background-snapshot' capability is supported by
* host kernel and compatible with guest memory configuration.
*/
wt_support = migrate_query_write_tracking();
if (wt_support < WT_SUPPORT_AVAILABLE) {
error_setg(errp, "Background-snapshot is not supported by host kernel");
return false;
}
if (wt_support < WT_SUPPORT_COMPATIBLE) {
error_setg(errp, "Background-snapshot is not compatible "
"with guest memory configuration");
return false;
}
/*
* Check if there are any migration capabilities
* incompatible with 'background-snapshot'.
*/
for (idx = 0; idx < check_caps_background_snapshot.size; idx++) {
int incomp_cap = check_caps_background_snapshot.caps[idx];
if (new_caps[incomp_cap]) {
error_setg(errp,
"Background-snapshot is not compatible with %s",
MigrationCapability_str(incomp_cap));
return false;
}
}
}
#ifdef CONFIG_LINUX
if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] &&
(!new_caps[MIGRATION_CAPABILITY_MULTIFD] ||
new_caps[MIGRATION_CAPABILITY_COMPRESS] ||
new_caps[MIGRATION_CAPABILITY_XBZRLE] ||
migrate_multifd_compression() ||
migrate_use_tls())) {
error_setg(errp,
"Zero copy only available for non-compressed non-TLS multifd migration");
return false;
}
#else
if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) {
error_setg(errp,
"Zero copy currently only available on Linux");
return false;
}
#endif
if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) {
if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
error_setg(errp, "Postcopy preempt requires postcopy-ram");
return false;
}
/*
* Preempt mode requires urgent pages to be sent in separate
* channel, OTOH compression logic will disorder all pages into
* different compression channels, which is not compatible with the
* preempt assumptions on channel assignments.
*/
if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
error_setg(errp, "Postcopy preempt not compatible with compress");
return false;
}
}
if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) {
if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
error_setg(errp, "Multifd is not compatible with compress");
return false;
}
}
return true;
}
bool migrate_cap_set(int cap, bool value, Error **errp)
{
MigrationState *s = migrate_get_current();
bool new_caps[MIGRATION_CAPABILITY__MAX];
if (migration_is_running(s->state)) {
error_setg(errp, QERR_MIGRATION_ACTIVE);
return false;
}
memcpy(new_caps, s->capabilities, sizeof(new_caps));
new_caps[cap] = value;
if (!migrate_caps_check(s->capabilities, new_caps, errp)) {
return false;
}
s->capabilities[cap] = value;
return true;
}
MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp)
{
MigrationCapabilityStatusList *head = NULL, **tail = &head;
MigrationCapabilityStatus *caps;
MigrationState *s = migrate_get_current();
int i;
for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
#ifndef CONFIG_LIVE_BLOCK_MIGRATION
if (i == MIGRATION_CAPABILITY_BLOCK) {
continue;
}
#endif
caps = g_malloc0(sizeof(*caps));
caps->capability = i;
caps->state = s->capabilities[i];
QAPI_LIST_APPEND(tail, caps);
}
return head;
}
void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
Error **errp)
{
MigrationState *s = migrate_get_current();
MigrationCapabilityStatusList *cap;
bool new_caps[MIGRATION_CAPABILITY__MAX];
if (migration_is_running(s->state)) {
error_setg(errp, QERR_MIGRATION_ACTIVE);
return;
}
memcpy(new_caps, s->capabilities, sizeof(new_caps));
for (cap = params; cap; cap = cap->next) {
new_caps[cap->value->capability] = cap->value->state;
}
if (!migrate_caps_check(s->capabilities, new_caps, errp)) {
return;
}
for (cap = params; cap; cap = cap->next) {
s->capabilities[cap->value->capability] = cap->value->state;
}
}
/* parameters */
bool migrate_block_incremental(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.block_incremental;
}
uint32_t migrate_checkpoint_delay(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.x_checkpoint_delay;
}
int migrate_compress_level(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.compress_level;
}
int migrate_compress_threads(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.compress_threads;
}
int migrate_compress_wait_thread(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.compress_wait_thread;
}
uint8_t migrate_cpu_throttle_increment(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.cpu_throttle_increment;
}
uint8_t migrate_cpu_throttle_initial(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.cpu_throttle_initial;
}
bool migrate_cpu_throttle_tailslow(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.cpu_throttle_tailslow;
}
int migrate_decompress_threads(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.decompress_threads;
}
uint8_t migrate_max_cpu_throttle(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.max_cpu_throttle;
}
uint64_t migrate_max_bandwidth(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.max_bandwidth;
}
int64_t migrate_max_postcopy_bandwidth(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.max_postcopy_bandwidth;
}
int migrate_multifd_channels(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.multifd_channels;
}
MultiFDCompression migrate_multifd_compression(void)
{
MigrationState *s;
s = migrate_get_current();
assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX);
return s->parameters.multifd_compression;
}
int migrate_multifd_zlib_level(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.multifd_zlib_level;
}
int migrate_multifd_zstd_level(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.multifd_zstd_level;
}
uint8_t migrate_throttle_trigger_threshold(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.throttle_trigger_threshold;
}
uint64_t migrate_xbzrle_cache_size(void)
{
MigrationState *s;
s = migrate_get_current();
return s->parameters.xbzrle_cache_size;
}
/* parameters helpers */
AnnounceParameters *migrate_announce_params(void)
{
static AnnounceParameters ap;
MigrationState *s = migrate_get_current();
ap.initial = s->parameters.announce_initial;
ap.max = s->parameters.announce_max;
ap.rounds = s->parameters.announce_rounds;
ap.step = s->parameters.announce_step;
return &ap;
}
MigrationParameters *qmp_query_migrate_parameters(Error **errp)
{
MigrationParameters *params;
MigrationState *s = migrate_get_current();
/* TODO use QAPI_CLONE() instead of duplicating it inline */
params = g_malloc0(sizeof(*params));
params->has_compress_level = true;
params->compress_level = s->parameters.compress_level;
params->has_compress_threads = true;
params->compress_threads = s->parameters.compress_threads;
params->has_compress_wait_thread = true;
params->compress_wait_thread = s->parameters.compress_wait_thread;
params->has_decompress_threads = true;
params->decompress_threads = s->parameters.decompress_threads;
params->has_throttle_trigger_threshold = true;
params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold;
params->has_cpu_throttle_initial = true;
params->cpu_throttle_initial = s->parameters.cpu_throttle_initial;
params->has_cpu_throttle_increment = true;
params->cpu_throttle_increment = s->parameters.cpu_throttle_increment;
params->has_cpu_throttle_tailslow = true;
params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow;
params->tls_creds = g_strdup(s->parameters.tls_creds);
params->tls_hostname = g_strdup(s->parameters.tls_hostname);
params->tls_authz = g_strdup(s->parameters.tls_authz ?
s->parameters.tls_authz : "");
params->has_max_bandwidth = true;
params->max_bandwidth = s->parameters.max_bandwidth;
params->has_downtime_limit = true;
params->downtime_limit = s->parameters.downtime_limit;
params->has_x_checkpoint_delay = true;
params->x_checkpoint_delay = s->parameters.x_checkpoint_delay;
params->has_block_incremental = true;
params->block_incremental = s->parameters.block_incremental;
params->has_multifd_channels = true;
params->multifd_channels = s->parameters.multifd_channels;
params->has_multifd_compression = true;
params->multifd_compression = s->parameters.multifd_compression;
params->has_multifd_zlib_level = true;
params->multifd_zlib_level = s->parameters.multifd_zlib_level;
params->has_multifd_zstd_level = true;
params->multifd_zstd_level = s->parameters.multifd_zstd_level;
params->has_xbzrle_cache_size = true;
params->xbzrle_cache_size = s->parameters.xbzrle_cache_size;
params->has_max_postcopy_bandwidth = true;
params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth;
params->has_max_cpu_throttle = true;
params->max_cpu_throttle = s->parameters.max_cpu_throttle;
params->has_announce_initial = true;
params->announce_initial = s->parameters.announce_initial;
params->has_announce_max = true;
params->announce_max = s->parameters.announce_max;
params->has_announce_rounds = true;
params->announce_rounds = s->parameters.announce_rounds;
params->has_announce_step = true;
params->announce_step = s->parameters.announce_step;
if (s->parameters.has_block_bitmap_mapping) {
params->has_block_bitmap_mapping = true;
params->block_bitmap_mapping =
QAPI_CLONE(BitmapMigrationNodeAliasList,
s->parameters.block_bitmap_mapping);
}
return params;
}

76
migration/options.h Normal file
View File

@ -0,0 +1,76 @@
/*
* QEMU migration capabilities
*
* Copyright (c) 2012-2023 Red Hat Inc
*
* Authors:
* Orit Wasserman <owasserm@redhat.com>
* Juan Quintela <quintela@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef QEMU_MIGRATION_OPTIONS_H
#define QEMU_MIGRATION_OPTIONS_H
/* capabilities */
bool migrate_auto_converge(void);
bool migrate_background_snapshot(void);
bool migrate_block(void);
bool migrate_colo(void);
bool migrate_compress(void);
bool migrate_dirty_bitmaps(void);
bool migrate_events(void);
bool migrate_ignore_shared(void);
bool migrate_late_block_activate(void);
bool migrate_multifd(void);
bool migrate_pause_before_switchover(void);
bool migrate_postcopy_blocktime(void);
bool migrate_postcopy_preempt(void);
bool migrate_postcopy_ram(void);
bool migrate_rdma_pin_all(void);
bool migrate_release_ram(void);
bool migrate_return_path(void);
bool migrate_validate_uuid(void);
bool migrate_xbzrle(void);
bool migrate_zero_blocks(void);
bool migrate_zero_copy_send(void);
/*
* pseudo capabilities
*
* These are functions that are used in a similar way to capabilities
* check, but they are not a capability.
*/
bool migrate_postcopy(void);
/* capabilities helpers */
bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp);
bool migrate_cap_set(int cap, bool value, Error **errp);
/* parameters */
bool migrate_block_incremental(void);
uint32_t migrate_checkpoint_delay(void);
int migrate_compress_level(void);
int migrate_compress_threads(void);
int migrate_compress_wait_thread(void);
uint8_t migrate_cpu_throttle_increment(void);
uint8_t migrate_cpu_throttle_initial(void);
bool migrate_cpu_throttle_tailslow(void);
int migrate_decompress_threads(void);
uint8_t migrate_max_cpu_throttle(void);
uint64_t migrate_max_bandwidth(void);
int64_t migrate_max_postcopy_bandwidth(void);
int migrate_multifd_channels(void);
MultiFDCompression migrate_multifd_compression(void);
int migrate_multifd_zlib_level(void);
int migrate_multifd_zstd_level(void);
uint8_t migrate_throttle_trigger_threshold(void);
uint64_t migrate_xbzrle_cache_size(void);
#endif

1
migration/postcopy-ram.c
View File

@ -37,6 +37,7 @@
#include "tls.h"
#include "qemu/userfaultfd.h"
#include "qemu/mmap-alloc.h"
#include "options.h"
/* Arbitrary limit on size of each discard command,
* keeps them around ~200 bytes

43
migration/ram.c
View File

@ -57,6 +57,7 @@
#include "qemu/iov.h"
#include "multifd.h"
#include "sysemu/runstate.h"
#include "options.h"
#include "hw/boards.h" /* for machine_dump_guest_core() */
@ -155,14 +156,14 @@ static struct {
static void XBZRLE_cache_lock(void)
{
if (migrate_use_xbzrle()) {
if (migrate_xbzrle()) {
qemu_mutex_lock(&XBZRLE.lock);
}
}
static void XBZRLE_cache_unlock(void)
{
if (migrate_use_xbzrle()) {
if (migrate_xbzrle()) {
qemu_mutex_unlock(&XBZRLE.lock);
}
}
@ -585,7 +586,7 @@ static void compress_threads_save_cleanup(void)
{
int i, thread_count;
if (!migrate_use_compression() || !comp_param) {
if (!migrate_compress() || !comp_param) {
return;
}
@ -624,7 +625,7 @@ static int compress_threads_save_setup(void)
{
int i, thread_count;
if (!migrate_use_compression()) {
if (!migrate_compress()) {
return 0;
}
thread_count = migrate_compress_threads();
@ -710,11 +711,10 @@ static size_t save_page_header(PageSearchStatus *pss, QEMUFile *f,
static void mig_throttle_guest_down(uint64_t bytes_dirty_period,
uint64_t bytes_dirty_threshold)
{
MigrationState *s = migrate_get_current();
uint64_t pct_initial = s->parameters.cpu_throttle_initial;
uint64_t pct_increment = s->parameters.cpu_throttle_increment;
bool pct_tailslow = s->parameters.cpu_throttle_tailslow;
int pct_max = s->parameters.max_cpu_throttle;
uint64_t pct_initial = migrate_cpu_throttle_initial();
uint64_t pct_increment = migrate_cpu_throttle_increment();
bool pct_tailslow = migrate_cpu_throttle_tailslow();
int pct_max = migrate_max_cpu_throttle();
uint64_t throttle_now = cpu_throttle_get_percentage();
uint64_t cpu_now, cpu_ideal, throttle_inc;
@ -1136,7 +1136,7 @@ static void migration_update_rates(RAMState *rs, int64_t end_time)
return;
}
if (migrate_use_xbzrle()) {
if (migrate_xbzrle()) {
double encoded_size, unencoded_size;
xbzrle_counters.cache_miss_rate = (double)(xbzrle_counters.cache_miss -
@ -1154,7 +1154,7 @@ static void migration_update_rates(RAMState *rs, int64_t end_time)
rs->xbzrle_bytes_prev = xbzrle_counters.bytes;
}
if (migrate_use_compression()) {
if (migrate_compress()) {
compression_counters.busy_rate = (double)(compression_counters.busy -
rs->compress_thread_busy_prev) / page_count;
rs->compress_thread_busy_prev = compression_counters.busy;
@ -1177,8 +1177,7 @@ static void migration_update_rates(RAMState *rs, int64_t end_time)
static void migration_trigger_throttle(RAMState *rs)
{
MigrationState *s = migrate_get_current();
uint64_t threshold = s->parameters.throttle_trigger_threshold;
uint64_t threshold = migrate_throttle_trigger_threshold();
uint64_t bytes_xfer_period =
stat64_get(&ram_counters.transferred) - rs->bytes_xfer_prev;
uint64_t bytes_dirty_period = rs->num_dirty_pages_period * TARGET_PAGE_SIZE;
@ -1245,7 +1244,7 @@ static void migration_bitmap_sync(RAMState *rs)
rs->num_dirty_pages_period = 0;
rs->bytes_xfer_prev = stat64_get(&ram_counters.transferred);
}
if (migrate_use_events()) {
if (migrate_events()) {
uint64_t generation = stat64_get(&ram_counters.dirty_sync_count);
qapi_event_send_migration_pass(generation);
}
@ -1625,7 +1624,7 @@ static int find_dirty_block(RAMState *rs, PageSearchStatus *pss)
/* Flag that we've looped */
pss->complete_round = true;
/* After the first round, enable XBZRLE. */
if (migrate_use_xbzrle()) {
if (migrate_xbzrle()) {
rs->xbzrle_enabled = true;
}
}
@ -2269,7 +2268,7 @@ int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len)
static bool save_page_use_compression(RAMState *rs)
{
if (!migrate_use_compression()) {
if (!migrate_compress()) {
return false;
}
@ -2361,7 +2360,7 @@ static int ram_save_target_page_legacy(RAMState *rs, PageSearchStatus *pss)
* if host page size == guest page size the dest guest during run may
* still see partially copied pages which is data corruption.
*/
if (migrate_use_multifd() && !migration_in_postcopy()) {
if (migrate_multifd() && !migration_in_postcopy()) {
return ram_save_multifd_page(pss->pss_channel, block, offset);
}
@ -2978,7 +2977,7 @@ static int xbzrle_init(void)
{
Error *local_err = NULL;
if (!migrate_use_xbzrle()) {
if (!migrate_xbzrle()) {
return 0;
}
@ -3733,7 +3732,7 @@ static int wait_for_decompress_done(void)
{
int idx, thread_count;
if (!migrate_use_compression()) {
if (!migrate_compress()) {
return 0;
}
@ -3752,7 +3751,7 @@ static void compress_threads_load_cleanup(void)
{
int i, thread_count;
if (!migrate_use_compression()) {
if (!migrate_compress()) {
return;
}
thread_count = migrate_decompress_threads();
@ -3793,7 +3792,7 @@ static int compress_threads_load_setup(QEMUFile *f)
{
int i, thread_count;
if (!migrate_use_compression()) {
if (!migrate_compress()) {
return 0;
}
@ -4259,7 +4258,7 @@ static int ram_load_precopy(QEMUFile *f)
int flags = 0, ret = 0, invalid_flags = 0, len = 0, i = 0;
/* ADVISE is earlier, it shows the source has the postcopy capability on */
bool postcopy_advised = migration_incoming_postcopy_advised();
if (!migrate_use_compression()) {
if (!migrate_compress()) {
invalid_flags |= RAM_SAVE_FLAG_COMPRESS_PAGE;
}

12
migration/rdma.c
View File

@ -35,6 +35,7 @@
#include <rdma/rdma_cma.h>
#include "trace.h"
#include "qom/object.h"
#include "options.h"
#include <poll.h>
/*
@ -3373,7 +3374,7 @@ static int qemu_rdma_accept(RDMAContext *rdma)
* initialize the RDMAContext for return path for postcopy after first
* connection request reached.
*/
if ((migrate_postcopy() || migrate_use_return_path())
if ((migrate_postcopy() || migrate_return_path())
&& !rdma->is_return_path) {
rdma_return_path = qemu_rdma_data_init(rdma->host_port, NULL);
if (rdma_return_path == NULL) {
@ -3456,7 +3457,7 @@ static int qemu_rdma_accept(RDMAContext *rdma)
}
/* Accept the second connection request for return path */
if ((migrate_postcopy() || migrate_use_return_path())
if ((migrate_postcopy() || migrate_return_path())
&& !rdma->is_return_path) {
qemu_set_fd_handler(rdma->channel->fd, rdma_accept_incoming_migration,
NULL,
@ -4178,8 +4179,7 @@ void rdma_start_outgoing_migration(void *opaque,
goto err;
}
ret = qemu_rdma_source_init(rdma,
s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL], errp);
ret = qemu_rdma_source_init(rdma, migrate_rdma_pin_all(), errp);
if (ret) {
goto err;
@ -4193,7 +4193,7 @@ void rdma_start_outgoing_migration(void *opaque,
}
/* RDMA postcopy need a separate queue pair for return path */
if (migrate_postcopy() || migrate_use_return_path()) {
if (migrate_postcopy() || migrate_return_path()) {
rdma_return_path = qemu_rdma_data_init(host_port, errp);
if (rdma_return_path == NULL) {
@ -4201,7 +4201,7 @@ void rdma_start_outgoing_migration(void *opaque,
}
ret = qemu_rdma_source_init(rdma_return_path,
s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL], errp);
migrate_rdma_pin_all(), errp);
if (ret) {
goto return_path_err;

3
migration/savevm.c
View File

@ -67,6 +67,7 @@
#include "qemu/yank.h"
#include "yank_functions.h"
#include "sysemu/qtest.h"
#include "options.h"
const unsigned int postcopy_ram_discard_version;
@ -1611,7 +1612,7 @@ static int qemu_savevm_state(QEMUFile *f, Error **errp)
return -EINVAL;
}
if (migrate_use_block()) {
if (migrate_block()) {
error_setg(errp, "Block migration and snapshots are incompatible");
return -EINVAL;
}

5
migration/socket.c
View File

@ -27,6 +27,7 @@
#include "io/net-listener.h"
#include "trace.h"
#include "postcopy-ram.h"
#include "options.h"
struct SocketOutgoingArgs {
SocketAddress *saddr;
@ -97,7 +98,7 @@ static void socket_outgoing_migration(QIOTask *task,
trace_migration_socket_outgoing_connected(data->hostname);
if (migrate_use_zero_copy_send() &&
if (migrate_zero_copy_send() &&
!qio_channel_has_feature(sioc, QIO_CHANNEL_FEATURE_WRITE_ZERO_COPY)) {
error_setg(&err, "Zero copy send feature not detected in host kernel");
}
@ -182,7 +183,7 @@ socket_start_incoming_migration_internal(SocketAddress *saddr,
qio_net_listener_set_name(listener, "migration-socket-listener");
if (migrate_use_multifd()) {
if (migrate_multifd()) {
num = migrate_multifd_channels();
} else if (migrate_postcopy_preempt()) {
num = RAM_CHANNEL_MAX;

28
qapi/migration.json
View File

@ -1203,34 +1203,6 @@
{ 'command': 'query-migrate-parameters',
'returns': 'MigrationParameters' }
##
# @client_migrate_info:
#
# Set migration information for remote display. This makes the server
# ask the client to automatically reconnect using the new parameters
# once migration finished successfully. Only implemented for SPICE.
#
# @protocol: must be "spice"
# @hostname: migration target hostname
# @port: spice tcp port for plaintext channels
# @tls-port: spice tcp port for tls-secured channels
# @cert-subject: server certificate subject
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "client_migrate_info",
# "arguments": { "protocol": "spice",
# "hostname": "virt42.lab.kraxel.org",
# "port": 1234 } }
# <- { "return": {} }
#
##
{ 'command': 'client_migrate_info',
'data': { 'protocol': 'str', 'hostname': 'str', '*port': 'int',
'*tls-port': 'int', '*cert-subject': 'str' } }
##
# @migrate-start-postcopy:
#

28
qapi/ui.json
View File

@ -1554,3 +1554,31 @@
{ 'command': 'display-update',
'data': 'DisplayUpdateOptions',
'boxed' : true }
##
# @client_migrate_info:
#
# Set migration information for remote display. This makes the server
# ask the client to automatically reconnect using the new parameters
# once migration finished successfully. Only implemented for SPICE.
#
# @protocol: must be "spice"
# @hostname: migration target hostname
# @port: spice tcp port for plaintext channels
# @tls-port: spice tcp port for tls-secured channels
# @cert-subject: server certificate subject
#
# Since: 0.14
#
# Example:
#
# -> { "execute": "client_migrate_info",
# "arguments": { "protocol": "spice",
# "hostname": "virt42.lab.kraxel.org",
# "port": 1234 } }
# <- { "return": {} }
#
##
{ 'command': 'client_migrate_info',
'data': { 'protocol': 'str', 'hostname': 'str', '*port': 'int',
'*tls-port': 'int', '*cert-subject': 'str' } }

17
ui/ui-hmp-cmds.c
View File

@ -458,3 +458,20 @@ hmp_screendump(Monitor *mon, const QDict *qdict)
end:
hmp_handle_error(mon, err);
}
void hmp_client_migrate_info(Monitor *mon, const QDict *qdict)
{
Error *err = NULL;
const char *protocol = qdict_get_str(qdict, "protocol");
const char *hostname = qdict_get_str(qdict, "hostname");
bool has_port = qdict_haskey(qdict, "port");
int port = qdict_get_try_int(qdict, "port", -1);
bool has_tls_port = qdict_haskey(qdict, "tls-port");
int tls_port = qdict_get_try_int(qdict, "tls-port", -1);
const char *cert_subject = qdict_get_try_str(qdict, "cert-subject");
qmp_client_migrate_info(protocol, hostname,
has_port, port, has_tls_port, tls_port,
cert_subject, &err);
hmp_handle_error(mon, err);
}

29
ui/ui-qmp-cmds.c
View File

@ -175,3 +175,32 @@ void qmp_display_update(DisplayUpdateOptions *arg, Error **errp)
abort();
}
}
void qmp_client_migrate_info(const char *protocol, const char *hostname,
bool has_port, int64_t port,
bool has_tls_port, int64_t tls_port,
const char *cert_subject,
Error **errp)
{
if (strcmp(protocol, "spice") == 0) {
if (!qemu_using_spice(errp)) {
return;
}
if (!has_port && !has_tls_port) {
error_setg(errp, QERR_MISSING_PARAMETER, "port/tls-port");
return;
}
if (qemu_spice.migrate_info(hostname,
has_port ? port : -1,
has_tls_port ? tls_port : -1,
cert_subject)) {
error_setg(errp, "Could not set up display for migration");
return;
}
return;
}
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "protocol", "'spice'");
}